2、3個提高生活質量，大於3個則會降低。一個太少，孤單寂寞，影響生活質量。

來源: tzbcwbc 於 2014-03-20 11:20:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.